<template>
<div class="app-container">
<h2 style="text-align: center;">发布新课程</h2>
<el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
<el-step title="填写课程基本信息"/>
<el-step title="创建课程大纲"/>
<el-step title="最终发布"/>
</el-steps>

<el-button type="text" @click="openChapterDialog()">添加章节</el-button>
<!-- 章节 -->
<ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
        <p>
                {{ chapter.title }}
                <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
          
        </p>
        <!-- 视频 -->
        <ul class="chanpterList videoList">
        <li
            v-for="video in chapter.children"
            :key="video.id">
        <p>{{ video.title }}
            
           <span class="acts">
                    
                    <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
        </p>
            </li>
        </ul>
    </li>
</ul>
<div>
    <el-button @click="previous">上一步</el-button>
    <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
</div>

<!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

 <!-- 添加和修改课时表单 -->
<el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
  <el-form :model="video" label-width="120px">
    <el-form-item label="课时标题">
      <el-input v-model="video.title"/>
    </el-form-item>
    <el-form-item label="课时排序">
      <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
    </el-form-item>
    <el-form-item label="是否免费">
      <el-radio-group v-model="video.free">
        <el-radio :label="true">免费</el-radio>
        <el-radio :label="false">默认</el-radio>
      </el-radio-group>
    </el-form-item>

   <el-form-item label="上传视频">
        <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
            :limit="1"
            class="upload-demo">
        <el-button size="small" type="primary">上传视频</el-button>
        <el-tooltip placement="right-end">
            <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
            <i class="el-icon-question"/>
        </el-tooltip>
        </el-upload>
    </el-form-item>

  </el-form>
  <div slot="footer" class="dialog-footer">
    <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
    <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
  </div>
</el-dialog>

<!-- </el-form-item>
</el-form> -->
</div>
</template>

<script>
 import chapter from '@/api/edu/chapter'
 import video from '@/api/edu/video'

export default {
    
    data() {
        return{
            saveVideoBtnDisabled:false,
            saveBtnDisabled:false,
            courseId:'',
            chapterVideoList:[],
            chapter:{
                title:'',
                sort:0
            },
            video:{
                 title: '',
                sort: 0,
                free: 0,
                videoSourceId: '',
                videoOriginalName:''

            },
            dialogChapterFormVisible:false,
            dialogVideoFormVisible:false,

             fileList: [],//上传文件列表
            BASE_API: process.env.BASE_API // 接口API地址
        }
    },
    created(){
        if(this.$route.params && this.$route.params.id){
                this.courseId = this.$route.params.id
                this.getChapterVideo()
        }
        
    },
    methods:{
        //点击确定调用的方法
        handleVodRemove() {
            //调用接口的删除视频的方法
            video.deleteAliyunvod(this.video.videoSourceId)
                .then(response => {
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除视频成功!'
                    });
                    //把文件列表清空
                    this.fileList = []
                    //把video视频id和视频名称值清空
                    //上传视频id赋值
                    this.video.videoSourceId = ''
                    //上传视频名称赋值
                    this.video.videoOriginalName = ''
                })
        },

        beforeVodRemove(file ,fileList){
            return this.$confirm(`确定删除${file.name}?`)
        },

          //上传视频成功调用的方法
        handleVodUploadSuccess(response, file, fileList) {
            //上传视频id赋值
            this.video.videoSourceId = response.data.videoId
            //上传视频名称赋值
            this.video.videoOriginalName = file.name
        },
        handleUploadExceed() {
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },

        //删除小节
        removeVideo(id){
            this.$confirm('此操作将删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                video.deleteVideo(id)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                   //刷新页面
                this.getChapterVideo()
                })
            }) //点击取消，执行catch方法
        },

        

         openEditVideo(id) {
            //弹框
            this.dialogVideoFormVisible = true
            //调用接口
            video.getVideo(id)   
                .then(response => {
                    this.video = response.data.video
                })
        },

        //添加小节弹框
        openVideo(chapterId){
            this.dialogVideoFormVisible=true

            //设置章节id
            this.video.chapterId = chapterId
            this.video.title=''
            this.video.sort=0,
            this.video.free=0,
            this.video.videoSourceId=''
        },

        
        addVideo(){
            this.video.courseId=this.courseId
            video.addVideo(this.video)
             .then(response=>{
                //关闭弹框
            this.dialogVideoFormVisible=false
                //提示
                this.$message({
                type: 'success',
                message:'添加章节成功'
            });
           
                //刷新页面
                this.getChapterVideo()
            })
        },

        updateVideo(){
            video.updateVideo(this.video)
            .then(response=>{
                //关闭弹框
            this.dialogVideoFormVisible=false
                //提示
                this.$message({
                type: 'success',
                message:'修改小节成功'
            });
           
                //刷新页面
                this.getChapterVideo()
            })
        },

        saveOrUpdateVideo(){
           if(!this.video.id){
                this.addVideo()
           }else{
                this.updateVideo()
           }
              
        },
       

        


        //========================================章节操作
        //删除章节
        removeChapter(chapterId){
         this.$confirm('此操作将删除章节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                chapter.deleteChapter(chapterId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                   //刷新页面
                this.getChapterVideo()
                })
            }) //点击取消，执行catch方法
    },

        //修改章节弹框数据回显
         openEditChatper(chapterId) {
            //弹框
            this.dialogChapterFormVisible = true
            //调用接口
            chapter.getChapter(chapterId)   
                .then(response => {
                    this.chapter = response.data.chapter
                })
        },

        //弹出添加章节页面
        openChapterDialog(){
            this.dialogChapterFormVisible=true

            this.chapter.title=''
            this.chapter.sort=0
        },

        //添加章节
        addChapter(){
             this.chapter.courseId = this.courseId
            chapter.addChapter(this.chapter)
            .then(response=>{
                //关闭弹框
            this.dialogChapterFormVisible=false
                //提示
                this.$message({
                type: 'success',
                message:'添加章节成功'
            });
           
                //刷新页面
                this.getChapterVideo()
            })
        },

        updateChapter(){
            chapter.updateChapter(this.chapter)
            .then(response=>{
                //关闭弹框
            this.dialogChapterFormVisible=false
                //提示
                this.$message({
                type: 'success',
                message:'修改章节成功'
            });
           
                //刷新页面
                this.getChapterVideo()
            })
        },

        saveOrUpdate(){
           if(!this.chapter.id){
                this.addChapter()
           }else{
                this.updateChapter()
           }
              
        },

        getChapterVideo(){
            chapter.getAllChapterVideo(this.courseId)
            .then(response =>{
                this.chapterVideoList=response.data.allChapterVideo
            })
        },
        previous(){
            this.$router.push({path:'/course/info/'+this.courseId})
        },
        next(){
            this.$router.push({path:'/course/publish/'+this.courseId})
        }
    }
} 
</script>

<style scoped>
    .chanpterList{
        position: relative;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .chanpterList li{
        position: relative;
    }
    .chanpterList p{
        float: left;
        font-size: 20px;
        margin: 10px 0;
        padding: 10px;
        height: 70px;
        line-height: 50px;
        width: 100%;
        border: 1px solid #DDD;
    }
    .chanpterList .acts {
        float: right;
        font-size: 14px;
    }
    .videoList{
        padding-left: 50px;
    }
    .videoList p{
        float: left;
        font-size: 14px;
        margin: 10px 0;
        padding: 10px;
        height: 50px;
        line-height: 30px;
        width: 100%;
        border: 1px dotted #DDD;
    }
</style>